"The Oberwolfach Photo Collection - Photographs of Mathematicians from all over the world
"The Oberwolfach Photo Collection is based on Prof. Konrad Jacobs' (Erlangen) large collection of photographs of mathematicians from all over the world. In the 1950's Prof. Jacobs started to make copies of the photographs he had taken and donated these copies to the MFO. In 2005 he transferred his whole collection completely with all rights to the MFO.
"The Mathematisches Forschungsinstitut Oberwolfach gGmbH (MFO) owns the copyright to most of the images used on this website. Those images labelled with "Copyright:MFO" can be used under the Creative Commons License Attribution-Share Alike 2.0 Germany."
Note that photos like this http://owpdb.mfo.de/detail?photoID=9473 which say "Copyright: George M. Bergman, Berkeley" are NOT CC-BY-SA! Only ones like this http://owpdb.mfo.de/detail?photoID=2598 which say "Copyright: MFO".
Please fwd to mathematics wikiprojects where relevant.
cheers Brianna